/*

 */

/*

 * Copyright 2003-2004 The Apache Software Foundation.

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.sun.org.apache.xerces.internal.impl.xs.models;

import com.sun.org.apache.xerces.internal.impl.Constants;

import com.sun.org.apache.xerces.internal.impl.XMLErrorReporter;

import com.sun.org.apache.xerces.internal.impl.dtd.models.CMNode;

import com.sun.org.apache.xerces.internal.impl.xs.XSMessageFormatter;

import com.sun.org.apache.xerces.internal.utils.XMLSecurityManager;

import com.sun.org.apache.xerces.internal.xni.parser.XMLComponentManager;

import com.sun.org.apache.xerces.internal.xni.parser.XMLConfigurationException;

/**

 *

 * @xerces.internal

 *

 * @author  Neeraj Bajaj

 *

 */

public class CMNodeFactory {

    /** Property identifier: error reporter. */

    private static final String ERROR_REPORTER =

        Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_REPORTER_PROPERTY;

    /** property identifier: security manager. */

    private static final String SECURITY_MANAGER =

        Constants.XERCES_PROPERTY_PREFIX + Constants.SECURITY_MANAGER_PROPERTY;

    private static final boolean DEBUG = false ;

    //

    private static final int MULTIPLICITY = 1 ;

    //count of number of nodes created

    private int nodeCount = 0;

    //No. of nodes allowed.

    private int maxNodeLimit ;

    /**

     * Error reporter. This property identifier is:

     * http://apache.org/xml/properties/internal/error-reporter

     */

    private XMLErrorReporter fErrorReporter;

    // stores defaults for different security holes (maxOccurLimit in current context) if it has

    // been set on the configuration.

    private XMLSecurityManager fSecurityManager = null;

    /** default constructor */

    public CMNodeFactory() {

    }

        fErrorReporter = (XMLErrorReporter)componentManager.getProperty(ERROR_REPORTER);

        try {

            fSecurityManager = (XMLSecurityManager)componentManager.getProperty(SECURITY_MANAGER);

        }

        catch (XMLConfigurationException e) {

            fSecurityManager = null;

        }

    }//reset()

    public CMNode getCMLeafNode(int type, Object leaf, int id, int position) {

        return new XSCMLeaf(type, leaf, id, position) ;

    }

    public CMNode getCMRepeatingLeafNode(int type, Object leaf,

            int minOccurs, int maxOccurs, int id, int position) {

        nodeCountCheck();

        return new XSCMRepeatingLeaf(type, leaf, minOccurs, maxOccurs, id, position);

    }

    public CMNode getCMUniOpNode(int type, CMNode childNode) {

        nodeCountCheck();

        return new XSCMUniOp(type, childNode) ;

    }

    public CMNode getCMBinOpNode(int type, CMNode leftNode, CMNode rightNode) {

        return new XSCMBinOp(type, leftNode, rightNode) ;

    }

    public void nodeCountCheck(){

        if( fSecurityManager != null && !fSecurityManager.isNoLimit(maxNodeLimit) &&

                nodeCount++ > maxNodeLimit){

            if(DEBUG){

                System.out.println("nodeCount = " + nodeCount ) ;

                System.out.println("nodeLimit = " + maxNodeLimit ) ;

            }

            fErrorReporter.reportError(XSMessageFormatter.SCHEMA_DOMAIN, "maxOccurLimit", new Object[]{ new Integer(maxNodeLimit) }, XMLErrorReporter.SEVERITY_FATAL_ERROR);

            // similarly to entity manager behaviour, take into accont

            // behaviour if continue-after-fatal-error is set.

            nodeCount = 0;

        }

    }//nodeCountCheck()

    //reset the node count

    public void resetNodeCount(){

        nodeCount = 0 ;

    }

        /**

     * Sets the value of a property. This method is called by the component

     * manager any time after reset when a property changes value.

     * <p>

     * <strong>Note:</strong> Components should silently ignore properties

     * that do not affect the operation of the component.

     *

     * @param propertyId The property identifier.

     * @param value      The value of the property.

     *

     * @throws SAXNotRecognizedException The component should not throw

     *                                   this exception.

     * @throws SAXNotSupportedException The component should not throw

     *                                  this exception.

     */

    public void setProperty(String propertyId, Object value)

        throws XMLConfigurationException {

        // Xerces properties

        if (propertyId.startsWith(Constants.XERCES_PROPERTY_PREFIX)) {

                final int suffixLength = propertyId.length() - Constants.XERCES_PROPERTY_PREFIX.length();

            if (suffixLength == Constants.SECURITY_MANAGER_PROPERTY.length() &&

                propertyId.endsWith(Constants.SECURITY_MANAGER_PROPERTY)) {

                fSecurityManager = (XMLSecurityManager)value;

                maxNodeLimit = (fSecurityManager != null) ?

                        fSecurityManager.getLimit(XMLSecurityManager.Limit.MAX_OCCUR_NODE_LIMIT) * MULTIPLICITY : 0 ;

                return;

            }

            if (suffixLength == Constants.ERROR_REPORTER_PROPERTY.length() &&

                propertyId.endsWith(Constants.ERROR_REPORTER_PROPERTY)) {

                fErrorReporter = (XMLErrorReporter)value;

                return;

            }

        }

    } // setProperty(String,Object)

}//CMNodeFactory()